Foongus is a white mushroom-like Pokémon with a cap that looks quite similar to a Poké Ball. It has stubby, digit-less arms, a large pink mouth, and pinprick-like dark eyes. It uses the Poké Ball-like pattern on its head to lure people and Pokémon in grassy areas, then releases a cloud of poisonous spores to defend itself. It moves by either hopping or turning on its side and rolling on its cap.
A Foongus briefly appeared The Lonely Deino!, under the care of a Day Care owner named Bobby. It was picked up by its Trainer, who referred to it as his "best buddy".
Multiple Foongus appeared in So You're Having a Bad Day!. Bonnie and Meowth landed on top of them, and whilst Meowth was able to escape unscathed, Bonnie fell victim to their Spores.
Foongus, the Mushroom Pokémon. Foongus release poisonous spores to repel anyone who tries to catch them. For unknown reasons, they resemble Poké Balls.
Foongus is a Pokémon owned by Whitley. She used him to defeat a Sigilyph, earning his Trainer a Pokédex. This Foongus is nicknamed "Foongy". Foongus was a Pokémon liberated by Team Plasma. He first appeared in A Difficult Parting.
Foongus, along with its evolution, is similar to Voltorb and Electrode in that it resembles a Poké Ball.
However, unlike Voltorb and Electrode, it only has a Poké Ball design on it, instead of being in the shape of one.
Likewise, it features the whole design, complete with the circle resembling the button in the middle (contrary to Voltorb's evolution line having just the shape and general colors, and according to the Pokédex, being transformed Poké Balls themselves).
Like Voltorb and its evolved form, the idea of them being mistaken for the standard Item Balls is similar to a mimic, a monster archetype commonly found in RPGs.
Name origin
Foongus is a corruption of fungus and may be a combination of fool (to deceive, referencing its use of its Poké Ball-like cap to attract unsuspecting prey) and fungus. Together with its evolution, their names are a corruption of the phrase, "Fungus among us."
Tamagetake may be a combination of 玉 tama (sphere), 魂消る tamageru (to be astonished), and 茸 take (mushroom, or more specifically, the Shiitake mushroom).